You asked about SaaS
52 people built something like it. 0 are gone.
That is 0% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2025-01-01 | YCSpott AI-native ATS/CRM for recruiting firms · spott.io | still up |
| 2025-09-01 | YCUplane Replace marketing agencies with AI · uplane.com | still up |
| 2025-01-01 | Agents for Accelerated Clinical Trial Design · delineate.pro | still up |
| 2025-01-01 | AI hiring platform powered by expert recruiters · contrario.ai | still up |
| 2025-01-01 | YCCifrato AI Accountant for Accounting Firms · cifrato.ai | still up |
| 2025-01-01 | AI powered operating system for distributors and OEMs · salespatriot.com | still up |
| 2025-09-01 | YCLexi AI Operating System for Legal Teams · getlexi.io | still up |
| 2025-01-01 | YCCalltree Enterprise-grade AI support reps for call centers · calltree.ai | still up |
| 2025-09-01 | YCSemble The all-in-one software for integrators. · sembleai.com | still up |
| 2025-06-01 | Replacing the restaurant phone line with Voice AI · certus-ai.com | still up |
| 2025-09-01 | Your Company Brain · hyperspell.com | still up |
| 2025-01-01 | YCWoz Claude Code plugin that reduces token consumption and cost by 50% · wozcode.com | still up |
| 2025-06-01 | Analyze any footage, without training a model · ondeckai.com | still up |
| 2025-01-01 | YCVetnio AI Copilot that automates admin work for veterinary professionals · vetnio.com | still up |
| 2025-09-01 | YCAllus AI Transforming manufacturing with our next-gen Vision Foundation Model · allus.ai | still up |
| 2025-09-01 | AI for detecting patent infringements · patentwatch.ai | still up |
| 2025-01-01 | YCawen awen translates intent into exceptional visuals through conversation · awen.ai | still up |
| 2025-01-01 | YCOki The digital home for your personal memories · okihome.ai | still up |
| 2025-01-01 | An AI teammate that automatically updates your customer-facing docs · promptless.ai | still up |
| 2025-09-01 | YCMoss Real-time semantic search for Conversational AI · moss.dev | still up |
| 2025-01-01 | AI-driven exam prep · alice.tech | still up |
| 2025-09-01 | Simulate your customers with AI agents · expectedparrot.com | still up |
| 2025-06-01 | YCStormy Stormy runs the office so your crew can run the work. · stormy.ai | still up |
| 2025-09-01 | YCAside The browser built to do real work for you · aside.com | still up |
| 2025-01-01 | AI tutor starting with maths and science · excellence-ai.com | still up |
| 2025-01-01 | YCEdexia AI Teacher Assistant for Grading Essays · edexia.com | still up |
| 2025-06-01 | YCFloot The app platform inside Claude and ChatGPT. · floot.com | still up |
| 2025-06-01 | YCDoe The boring stuff, handled. Everything else, supercharged. · doe.so | still up |
| 2025-06-01 | YCSerafis Narrative intelligence for investors · serafis.ai | still up |
| 2025-01-01 | YCBystreet Your partner for hotel ownership data. · bystreet.com | still up |
| 2025-06-01 | YCTrace Context-aware orchestration between humans and AI. · trace.so | still up |
| 2025-06-01 | YCPaloma Digital transformation for real economy businesses · getpaloma.ai | still up |
| 2025-09-01 | Real World Environments and Data for AI · withspecific.com | still up |
| 2025-06-01 | YCMimos The growth OS for plaintiff-side law firms · trymimos.com | still up |
| 2025-06-01 | AI-native ERP for food wholesalers · stockline.ai | still up |
| 2025-01-01 | YCRiviera AI Employees for Hotels · withriviera.com | still up |
| 2025-06-01 | YCOkibi Turns products into CLIs and agents into customers · okibi.ai | still up |
| 2025-01-01 | YCOvlo Founder led hiring for London startups · ovlo.ai | still up |
| 2025-09-01 | YCRelaw AI Legal OS · relaw.ai | still up |
| 2025-06-01 | YCChar The AI notepad that knows and works for you · char.com | still up |
| 2025-01-01 | YCSennu AI We turn traditional companies into AI companies · sennu.ai | still up |
| 2025-01-01 | YCPraxim The agentic AI Word editor · praxim.ai | still up |
| 2025-01-01 | The AI Front Door For Law Firms · openintake.ai | still up |
| 2025-01-01 | YCG LNK Simplifying Collaboration for Healthcare Organizations & Professionals · glnkco.com | still up |
| 2025-01-01 | The health coach that texts you first · tryamby.com | still up |
| 2025-01-01 | Outbound Sequencing Infrastructure for Startups · verbiflow.com | still up |
| 2025-06-01 | YCPlaygent Sandboxes for AI agents · useplaygent.com | still up |
| 2025-06-01 | YCFrizzle AI Grading for Teachers · frizzle.com | still up |
| 2025-06-01 | ChatGPT's memory feature in an open, portable format · epicenter.so | still up |
| 2025-06-01 | Do your life's work with agents · proliferate.com | still up |
| 2025-01-01 | YCErgo AI agents and unified data layer for revenue teams · joinergo.com | still up |
| 2025-01-01 | Reimagining how Machines Learn · lucidic.ai | still up |
How this compares
The register re-probes every domain it holds. Some that answered last month stop answering. We send that list — what went quiet, and what it was — once a month. Nothing else.
How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.